error.log

error[E0597]: `modbus` does not live long enough
   --> src/lib.rs:302:9
    |
302 |         modbus.on_data_received(&[0x42, 0x42]);
    |         ^^^^^^ borrowed value does not live long enough
303 |         modbus.next().await;
304 |     }
    |     -
    |     |
    |     `modbus` dropped here while still borrowed
    |     borrow might be used here, when `modbus` is dropped and runs the destructor for type `Modbus<'_, typenum::uint::UInt<typenum::uint::UInt<typenum::uint::UInt<typenum::uint::UInt<typenum::uint::UInt<typenum::uint::UInt<typenum::uint::UInt<typenum::uint::UInt<typenum::uint::UInt<typenum::uint::UInt<typenum::uint::UInt<typenum::uint::UInt<typenum::uint::UTerm, typenum::bit::B1>, typenum::bit::B0>, typenum::bit::B0>, typenum::bit::B0>, typenum::bit::B0>, typenum::bit::B0>, typenum::bit::B0>, typenum::bit::B0>, typenum::bit::B0>, typenum::bit::B0>, typenum::bit::B0>, typenum::bit::B0>>`

error[E0499]: cannot borrow `modbus` as mutable more than once at a time
   --> src/lib.rs:303:9
    |
302 |         modbus.on_data_received(&[0x42, 0x42]);
    |         ------ first mutable borrow occurs here
303 |         modbus.next().await;
    |         ^^^^^^
    |         |
    |         second mutable borrow occurs here
    |         first borrow later used here

error: aborting due to 2 previous errors; 1 warning emitted

test.rs

async fn test() {
    println!("Hello, world!");
    let bb = bbqueue::BBBuffer::<bbqueue::atomic::consts::U2048>::new();
    let mut modbus = super::Modbus::new(&bb);
    modbus.on_data_received(&[0x42, 0x42]);
    modbus.next().await;
}